Consider the following about Sand and dust storms across the world 1 They can travel thousands of ki...........

Geography and Environment (HCS) World climates

Consider the following about Sand and dust storms across the world.

1. They can travel thousands of kilometres across continents and oceans.

2. Chronic exposure to fine dust contributes to premature deaths from respiratory and cardiovascular diseases.

3. Deforestation and unsustainable agricultural practices such as excessive withdrawal of water from water bodies can lead to sand and dust storms.

Select the correct answer using the codes below.

2 only

1, 2 and 3

2 and 3 only

1 and 3 only

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Explanation:

Statement1: They result from strong turbulent winds eroding sand, silt and clay particles from arid landscapes and impoverishing their soils. The storms can raise large quantities of particles high into the air. They can travel thousands of kilometres across continents and oceans, entraining other pollutants on the way and depositing particles far from their origin.

Statement2: Dust harms both humans and animals. Chronic exposure to fine dust contributes to premature deaths from respiratory and cardiovascular diseases, lung cancer and acute lower respiratory infections.

Statement3: The anthropogenic causes of sand and dust storms include deforestation and unsustainable agricultural practices as well as excessive water extraction and the modification of water bodies for irrigation and other purposes. Sand and dust storms are thus connected with a range of environmental and development issues that extend across national, regional, and continental boundaries.